Macro

Description

Make three of these macros, change arena1 to arena2 and arena3 on each. Change [mod:alt] to your preferred modifier: [mod:ctrl, mod:shift, mod:alt].
I prefer to use binds: 1, 2, 3 to Target arena1/2/3 and binds: alt 1, alt 2, alt 3 to Focus arena1/2/3.
If you are going to bind/use both Target and Focus arena1/2/3, make sure you use the same bind with a modifier for Focus and Target. I highly suggest to use a very comfortable/fast and horizontal bind setup for this, such as 1 – 2 – 3. F1/F2/F3 is crap unless the F’s are close to your numbers (on some keyboards). Invest time in configuring your binds so that you have the space for this.
Source: http://www.arenajunkies.com/topic/224117-frost-mage-pvp-guide/